View clinical trials related to Aneuploidy.
Filter by:While IVF offers an effective treatment for infertility, a significant proportion of IVF cycles still result in failed implantation and early miscarriage. As such, new therapies that improve pregnancy outcomes are highly desirable. Both traditional and laser acupuncture during the IVF cycle has become a popular option for women looking to improve their pregnancy rates. However, studies looking to understand the effects of acupuncture on IVF have demonstrated contradicting results. While some studies show an improvement in pregnancy rates in women undergoing IVF with traditional acupuncture treatment, other studies show no difference. Moreover, there are few studies exploring the role of laser and traditional acupuncture in IVF cycles and the studies done thus far have shown no change in pregnancy rates. However, there have been no studies to-date that have looked at women who are receiving IVF for embryos with normal genetics. This is important because embryos with abnormal genetics are a major reason for failed implantation and miscarriage, which can make the effects of acupuncture on pregnancy rates difficult to evaluate. This study is a pilot study looking to better understand the role of laser and traditional acupuncture as a supplemental treatment in women undergoing euploid (normal genetics) embryo transfer. This is the first study to include only genetically normal embryos, which may help to better understand the effects of laser and traditional acupuncture on IVF outcomes.
Assessing whether Preimplantation Genetic Testing for Aneuploidy (PGT-A) can increase the ongoing pregnancy rate per transferred embryo and can decrease the time to pregnancy and miscarriage rate in patients with Recurrent Implantation Failure (RIF)
The purpose of this study is to investigate the prevalence of soft markers which will be identified during a second trimester ultrasound. Secondary aims were to estimate the association between the soft markers and trisomies 13, 18 and 21 as well as the effect on the number of invasive tests will be performed.
In general, nearly 85% of retrieved oocytes are mature and reproductively useful after the retrieval, whereas the remaining percentage are still at metaphase I or germinal vesicle stage (MI: 4% and GV: 11 %, respectively). The objective of our study is to assess if immature oocytes co-cultured with autologous cumulus cells is a safer strategy than just leaving the oocytes in standard culture.
This project aims to provide high- quality evidence to inform decisions by health care organisations about using first-tier non-invasive prenatal screening (NIPS) to replace traditional screening tests for trisomy 21, and potentially to screen for other fetal chromosome anomalies. We will compare the current screening approach of second-tier NIPS with the use of first-tier NIPS in a large cohort of pregnant women.
This is a randomized controlled trial of a low income and low health literacy population of pregnant women from a diverse racial and ethnic background to assess the effectiveness of a pre-visit educational video on prenatal genetic screening and testing options.
Mosaicism within an embryo is defined as the presence of two or more cell populations with different genotypes. Blastocysts classified as mosaic by Preimplamtation Genetic Testing for Aneuploidy (PGT-A) have been reported to implant less and miscarry more frequently than embryos classified as euploid. Because of the unknown impact of mosaicism on embryo development, these embryos are given low priority and are discarded for transfer. However, recent papers on the transfer of human embryos classified by PGT-A as mosaic suggest that embryos with a low fraction of abnormal cells resulting in viable, chromosomally normal ongoing pregnancies, and high-level mosaics resulting in fewer viable pregnancies, but so far none producing mosaic babies. The apparent presence of mosaicism in an embryo is used as a selection criteria for embryo transfer (ET), introducing a strong bias in terms of patient prognosis and embryo quality. Additionally, it is also possible that some embryos are incorrectly classified as "mosaic" due to technical variability derived from the processing of a uniform aneuploid embryo. The aims of this study is to provide evidences about the clinical significance of chromosomal mosaicism in PGT-A cycles by a prospective non-selection based methodology.
The purpose of this study is to develop and evaluate a blood test and automated microfluidic test platform for the prenatal screening of fetal aneuploidy.
Abnormal chromosome number, or aneuploidy, is common in human embryos. It is responsible for more than half of all miscarriages, and it is the leading cause of congenital birth defects. Besides, it has been described that aneuploidy may also affect embryo implantation. Therefore, selecting embryos that have the best chance of implanting and growing into a healthy baby is one of the most important steps in the field of assisted reproduction. Recent advances in genetic technologies, such as Next-Generation Sequencing (NGS), have allowed aneuploidy to be detected with greater sensitivity. The application of this technique to trophectoderm biopsies, taken from embryos before transfer to the uterus, has provided insight into the clinical impact of chromosomal status. This process of screening embryos to make sure they have the right number of chromosomes and to look for any structural abnormalities in the chromosomes is called Preimplantation Genetic Testing for Aneuploidy (PGT-A). It requires specific equipment and trained personnel that will add costs and risks, so non-invasive techniques are sought as an alternative. These non-invasive procedures have been explored by some groups analyzing the spent culture medium where the embryo is cultured up to the time of transfer or freezing. In daily routine, this media is discarded after finishing the embryo culture, but it has been reported that contains traces of embryonic cell-free DNA (cfDNA) that can represent the genetic load of the embryo. However, at the moment there is a high variability in results across studies, with a percentage of concordant results between the media and the trophectoderm biopsy ranging from 3.5 to 85.7%. Thus, the main objective of this project is to validate a new non-invasive method for PGT-A (niPGT-A), based on improved collection and analysis of the culture media to achieve higher rates of sensitivity and specificity and to decrease the effect of some intrinsic difficulties such as low embryonic cfDNA input, mosaicism and maternal contamination.
A standard part of obstetrical care is offering prenatal genetic screening. Numerous professional guidelines have emphasized the importance of pretest counseling for prenatal genetic screenings. Informed consent includes the optional nature of the test, information on the conditions being screened, possible test results, implication of each result, and the type of test offered (screening or diagnostic). This responsibility falls on the physician in a busy clinic. Technology may be able to address this limitation and give consistent pretest counseling for patients waiting for their appointment. This study is looking to evaluate the use of computer-aided genetics education module for facilitating decision making about prenatal genetic screening and testing for fetal chromosome conditions and carrier status.